Thanks for the advice, however I am using o2 in the uk and struggled to find info for them.

I can use the E-mail settings on the blackberry and get to the o2 address I created but no mention of my work address. If I choose edit from here I can see the sig but cant seem to change it directly. If I click the "?" I get an http 404 error :(

Now I'd confused, we run a Blackberry Enterprise Server here, I cannot seem to sind the option on the desktop manager (installed on my laptop) - I have gove to the server and found an option in there for signature (which is blank) - added on in there and it still hasn't made a difference.
It seems really, really hard to make a really, really simple change ? - Am I missing something fundemental here?

I've been trying to change on the device as well but unfortunately failing there too :( I can get to the E-mail settings on the blackberry and get to the o2 address I created (no mention of my work address). I can see the sig but cant seem to change it directly, If I click the "?" I get an http 404 error :(

Am I missing something here?

Thanks for all your help.. as you can tell this is driving me absolutely mad.

Mysig. from the BES has now gone... dont know how but its now blank. Not sure if I'm brave enough to try and change it again..., however I still have the sig on my o2 e-mail address.

If I go to the web site and enter my username and password it just comes up with a "check details and try aain" - if I choose the "lost password" option I can enter my user name and it says the password has been sucessfuly sent to the blackberry device, but I dont actually receive anything :(

I didn't create the o2 account on the web site initially I created i on the bb when setting it up initally but the e-mail actually works fine to a from....

In order to change it in Desktop Manager, DM has to be installed for BES use, and connected to the email profile and the server. Then it's under email settings.

For BES users it's easiest to just change this on the device.

I'm having similar trouble to this gentleman. I can't change my signature either on the device, have no option on the DM, and when I go to log into the BIS for Verizon -- my PC gets a "Your account is not accessable via HTML browser, please use your device"

But when I put that same address into the browser line on the phone browser, it takes me to a screen where there's a "?" by the signature, and clicking there gets me a "404" error.

I don't understand why changing the signature has to be so terribly hard. It took 5 seconds on my Q -- couldn't have been simpler. I've been trying on my 8330 for 4 days now. Granted, only a couple minutes a day.... but my goodness, this is ridiculous.